<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
</head>
<body>
    <!--准备好一个“容器”-->
    <div id="test"></div>

    <!--引入react核心库,必须在dom前面引入-->
    <script type="text/javascript" src="../js/react.development.js"></script>
    <!--引入react_dom，用于支持react操作DOM-->
    <script type="text/javascript" src="../js/react-dom.development.js"></script>
    <!--引入babel，用于将jsx转为js-->
    <script type="text/javascript" src="../js/babel.min.js"></script>
    <!--引入prop-types，用于对组件标签属性进行限制-->
    <script type="text/javascript" src="../js/prop-types.js"></script>
    <script type="text/babel">
        //创建组件
        class Demo extends React.Component {

            state = {isHot: false}

            showInfo = () => {
                const {input1} = this
                alert(input1.value)
            }

            changeWeather = () => {
                //获取原来的状态
                const {isHot} = this.state
                //更新状态
                this.setState({isHot: !isHot})
            }

            saveInput = (c) => {
                this.input1 = c;
                console.log('@', c);
            }

            render() {
                const {isHot} = this.state
                return (
                    <div>
                        <h2>今天天气很{isHot ? '炎热' : '凉爽'}</h2>
                        {/*<input ref={(c)=>{this.input1 = c;console.log('@',c);}} type="text"/><br/><br/>*/}
                        <input ref={this.saveInput} type="text"/><br/><br/>
                        <button onClick={this.showInfo}>点我提示输入的数据</button>
                        <button onClick={this.changeWeather}>点我切换天气</button>
                    </div>
                )
            }
        }

        //渲染组件到页面
        ReactDOM.render(<Demo/>, document.getElementById('test'))
    </script>

</body>
</html>